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A combination step stool and mechanic's seat in the form of a molded plastic, generally parallelepiped configuration includes a seat on one side supported on casters on the opposite side with a step stool surface adjacent the backside of the seat and spaced from a front side surface of the seat whic

A combination step stool and mechanic's seat in the form of a molded plastic, generally parallelepiped configuration includes a seat on one side supported on casters on the opposite side with a step stool surface adjacent the backside of the seat and spaced from a front side surface of the seat which includes a recess tray for tools and other items.

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What is claimed is: 1. A combination step stool and seat comprising, :n combination: a six sided, unitary single piece molded plastic, generally rectangular parallelepiped assembly of walls including a first side wall, an opposed second side wall with a molded seat, said seat including a back suppo

What is claimed is: 1. A combination step stool and seat comprising, :n combination: a six sided, unitary single piece molded plastic, generally rectangular parallelepiped assembly of walls including a first side wall, an opposed second side wall with a molded seat, said seat including a back support section with a hand grip passage, a transverse third side wall between the first side wall and second side wall, said third side wall comprising a generally flat, planar step surface and said back support section, a transverse fourth side wall spaced from and generally parallel to the third side wall for support of said combination assembly as a step stool, said first side wall being positionable at the floor to define a creeper with a molded seat, said fourth side wall being positional le at the floor at an alternative orientation of said assembly to define said step stool, said fourth side wall comprising an upper wall section, a lower wall section, and a connecting recess shelf wall section between said upper wall and lower wall sections, said recess shelf wall section extending partially to the third side wall wherein the upper wall section, the lower wall section, and the recess shell wall section being continuously molded; and casters mounted on the first side wall. 2. The combination of claim 1 wherein the second side wall includes arm support sections on each side of the molded seat extending from the back support section along the edge of the seat. 3. The combination of claim 1 wherein the first side wall includes a molded step. 4. The combination of claim 1 wherein a carter comprises a bushing mounted in a molded recess in the first side wall, said molded recess comprising a bushing counterbore in a molded plastic wall with an internal counterbore top wall, said counterbore top wall fused to a molded plastic counterbore wall of an adjacent counterbore molded in a wall adjacent the first side wall to thereby reinforce the bushing counterbore, said bushing positioned to receive a stem of a wheel housing. 5. The combination of claim 4 including a plurality of bushing each retained in said bushing counterbore. 6. A molded plastic stool having a base support wall with a recessed first bushing counterbore with a counterbore base wall and a top wall, said first bushing counterbore including a bushing of a caster assembly, said stool further including a secondary, integrally molded wall extending upwardly from the base support wall separate from said counterbore base wall, said secondary molded will including an adjacent second molded counterbore with an adjacent counterbore lateral wall fused to the top wall of the first bushing counterbore to reinforce the first bushing counterbore, said bushing positioned in said first bushing counterbore to received a stem of a wheel housing. 7. The combination of claim 6 comprising a plurality of combination first bushing counterbores and second adjacent counterbores fused thereto. 8. A step stool and work seat combination comprising: a unitary molded plastic, generally rectangular parallelepiped assembly including a first support wall; an opposed second side wall spaced form the first support wall, said second side wall including a molded seat outside surface; a transverse third wall extending between the first and second walls, said third wall comprising a generally flat, planar step support surface; a transverse fourth wall spaced from and generally parallel to the third wall and extending between the first and second walls; said first wall including a plurality of integrally molded recessed bushing counterbores, each said recessed bushing counterbore comprising a counterbore lateral wall and a top wall; and a plurality of second counterbores formed in a wall connected to said first wall, each said second counterbore including a lateral side wall fused to the top wall of each said recess bushing counterbore to provide structural support to said recessed bushing counterbore. 9. The combination of claim 8 further including a bushing for a wheel housing in each recessed bushing counterbore. 10. The combination of claim 9 including a wheel housing with a wheel joined to each bushing. 11. The combination of claim 8 including a recessed bushing counterbore at each corner of the first wail. 12. The combination of claim 8 including a recess shelf formed in the fourth wall, said fourth wall including an upper wall section and a lower wall section for support of the step stool third wall generally horizontally. 13. The combination of claim 8 further including a hand hold molded in the third wall adjacent the intersection thereof with the second wall. 14. The combination of claim 8, wherein the second wall seat includes a back section along the juncture with the third wall and first and second arm sections extending from the back section toward the fourth wall.